X-Git-Url: http://git.hcoop.net/bpt/guile.git/blobdiff_plain/3b3b36ddb7dfbd5094abee360c253c8f1216dcdd..609c3d3095e2d81e7a0d26a1e0cb8baed7f45750:/libguile/socket.c diff --git a/libguile/socket.c b/libguile/socket.c dissimilarity index 61% index 2f1508340..685d93277 100644 --- a/libguile/socket.c +++ b/libguile/socket.c @@ -1,1011 +1,1398 @@ -/* Copyright (C) 1996,1997,1998 Free Software Foundation, Inc. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this software; see the file COPYING. If not, write to - * the Free Software Foundation, Inc., 59 Temple Place, Suite 330, - * Boston, MA 02111-1307 USA - * - * As a special exception, the Free Software Foundation gives permission - * for additional uses of the text contained in its release of GUILE. - * - * The exception is that, if you link the GUILE library with other files - * to produce an executable, this does not by itself cause the - * resulting executable to be covered by the GNU General Public License. - * Your use of that executable is in no way restricted on account of - * linking the GUILE library code into it. - * - * This exception does not however invalidate any other reasons why - * the executable file might be covered by the GNU General Public License. - * - * This exception applies only to the code released by the - * Free Software Foundation under the name GUILE. If you copy - * code from other Free Software Foundation releases into a copy of - * GUILE, as the General Public License permits, the exception does - * not apply to the code that you add in this way. To avoid misleading - * anyone as to the status of such modified files, you must delete - * this exception notice from them. - * - * If you write modifications of your own for GUILE, it is your choice - * whether to permit this exception to apply to your modifications. - * If you do not wish that, delete this exception notice. */ - -/* Software engineering face-lift by Greg J. Badros, 11-Dec-1999, - gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */ - - - -#include - -#include "_scm.h" -#include "unif.h" -#include "feature.h" -#include "fports.h" - -#include "scm_validate.h" -#include "socket.h" - -#ifdef HAVE_STRING_H -#include -#endif -#ifdef HAVE_UNISTD_H -#include -#endif -#include -#include -#ifdef HAVE_UNIX_DOMAIN_SOCKETS -#include -#endif -#include -#include -#include - - - -SCM_DEFINE (scm_htons, "htons", 1, 0, 0, - (SCM in), -"Returns a new integer from @var{value} by converting from host to -network order. @var{value} must be within the range of a C unsigned -short integer.") -#define FUNC_NAME s_scm_htons -{ - unsigned short c_in; - - SCM_VALIDATE_INUM_COPY (1,in,c_in); - if (c_in != SCM_INUM (in)) - SCM_OUT_OF_RANGE (1,in); - - return SCM_MAKINUM (htons (c_in)); -} -#undef FUNC_NAME - -SCM_DEFINE (scm_ntohs, "ntohs", 1, 0, 0, - (SCM in), -"Returns a new integer from @var{value} by converting from network to -host order. @var{value} must be within the range of a C unsigned short -integer.") -#define FUNC_NAME s_scm_ntohs -{ - unsigned short c_in; - - SCM_VALIDATE_INUM_COPY (1,in,c_in); - if (c_in != SCM_INUM (in)) - SCM_OUT_OF_RANGE (1,in); - - return SCM_MAKINUM (ntohs (c_in)); -} -#undef FUNC_NAME - -SCM_DEFINE (scm_htonl, "htonl", 1, 0, 0, - (SCM in), -"Returns a new integer from @var{value} by converting from host to -network order. @var{value} must be within the range of a C unsigned -long integer.") -#define FUNC_NAME s_scm_htonl -{ - unsigned long c_in = SCM_NUM2ULONG (1,in); - return scm_ulong2num (htonl (c_in)); -} -#undef FUNC_NAME - -SCM_DEFINE (scm_ntohl, "ntohl", 1, 0, 0, - (SCM in), -"Returns a new integer from @var{value} by converting from network to -host order. @var{value} must be within the range of a C unsigned -long integer.") -#define FUNC_NAME s_scm_ntohl -{ - unsigned long c_in = SCM_NUM2ULONG (1,in); - return scm_ulong2num (ntohl (c_in)); -} -#undef FUNC_NAME - -SCM_SYMBOL (sym_socket, "socket"); - -static SCM -scm_sock_fd_to_port (int fd, const char *proc) -{ - SCM result; - if (fd == -1) - scm_syserror (proc); - result = scm_fdes_to_port (fd, "r+0", sym_socket); - return result; -} - - -#define SCM_SOCK_FD_TO_PORT(fd) (scm_sock_fd_to_port((fd),FUNC_NAME)) - -SCM_DEFINE (scm_socket, "socket", 3, 0, 0, - (SCM family, SCM style, SCM proto), -"Returns a new socket port of the type specified by @var{family}, @var{style} -and @var{protocol}. All three parameters are integers. Typical values -for @var{family} are the values of @code{AF_UNIX} -and @code{AF_INET}. Typical values for @var{style} are -the values of @code{SOCK_STREAM}, @code{SOCK_DGRAM} and @code{SOCK_RAW}. - -@var{protocol} can be obtained from a protocol name using -@code{getprotobyname}. A value of -zero specifies the default protocol, which is usually right. - -A single socket port cannot by used for communication until -it has been connected to another socket.") -#define FUNC_NAME s_scm_socket -{ - int fd; - SCM result; - - SCM_VALIDATE_INUM (1,family); - SCM_VALIDATE_INUM (2,style); - SCM_VALIDATE_INUM (3,proto); - fd = socket (SCM_INUM (family), SCM_INUM (style), SCM_INUM (proto)); - result = SCM_SOCK_FD_TO_PORT (fd); - return result; -} -#undef FUNC_NAME - - - -#ifdef HAVE_SOCKETPAIR -SCM_DEFINE (scm_socketpair, "socketpair", 3, 0, 0, - (SCM family, SCM style, SCM proto), -"Returns a pair of connected (but unnamed) socket ports of the type specified -by @var{family}, @var{style} and @var{protocol}. -Many systems support only -socket pairs of the @code{AF_UNIX} family. Zero is likely to be -the only meaningful value for @var{protocol}.") -#define FUNC_NAME s_scm_socketpair -{ - int fam; - int fd[2]; - SCM a; - SCM b; - - SCM_VALIDATE_INUM (1,family); - SCM_VALIDATE_INUM (2,style); - SCM_VALIDATE_INUM (3,proto); - - fam = SCM_INUM (family); - - if (socketpair (fam, SCM_INUM (style), SCM_INUM (proto), fd) == -1) - SCM_SYSERROR; - - a = SCM_SOCK_FD_TO_PORT(fd[0]); - b = SCM_SOCK_FD_TO_PORT(fd[1]); - return scm_cons (a, b); -} -#undef FUNC_NAME -#endif - -SCM_DEFINE (scm_getsockopt, "getsockopt", 3, 0, 0, - (SCM sock, SCM level, SCM optname), -"Returns the value of a particular socket option for the socket -port @var{socket}. @var{level} is an integer code for type of option -being requested, e.g., @code{SOL_SOCKET} for socket-level options. -@var{optname} is an -integer code for the option required and should be specified using one of -the symbols @code{SO_DEBUG}, @code{SO_REUSEADDR} etc. - -The returned value is typically an integer but @code{SO_LINGER} returns a -pair of integers.") -#define FUNC_NAME s_scm_getsockopt -{ - int fd; - int optlen; -#ifdef HAVE_STRUCT_LINGER - char optval[sizeof (struct linger)]; -#else - char optval[sizeof (scm_sizet)]; -#endif - int ilevel; - int ioptname; - -#ifdef HAVE_STRUCT_LINGER - optlen = (int) sizeof (struct linger); -#else - optlen = (int) sizeof (scm_sizet); -#endif - - sock = SCM_COERCE_OUTPORT (sock); - SCM_VALIDATE_OPFPORT (1,sock); - SCM_VALIDATE_INUM_COPY (2,level,ilevel); - SCM_VALIDATE_INUM_COPY (3,optname,ioptname); - - fd = SCM_FPORT_FDES (sock); - if (getsockopt (fd, ilevel, ioptname, (void *) optval, &optlen) == -1) - SCM_SYSERROR; - -#ifdef SO_LINGER - if (ilevel == SOL_SOCKET && ioptname == SO_LINGER) - { -#ifdef HAVE_STRUCT_LINGER - struct linger *ling = (struct linger *) optval; - return scm_cons (SCM_MAKINUM (ling->l_onoff), - SCM_MAKINUM (ling->l_linger)); -#else - scm_sizet *ling = (scm_sizet *) optval; - return scm_cons (SCM_MAKINUM (*ling), - SCM_MAKINUM (0)); -#endif - } -#endif -#ifdef SO_SNDBUF - if (ilevel == SOL_SOCKET && ioptname == SO_SNDBUF) - { - scm_sizet *bufsize = (scm_sizet *) optval; - return SCM_MAKINUM (*bufsize); - } -#endif -#ifdef SO_RCVBUF - if (ilevel == SOL_SOCKET && ioptname == SO_RCVBUF) - { - scm_sizet *bufsize = (scm_sizet *) optval; - return SCM_MAKINUM (*bufsize); - } -#endif - return SCM_MAKINUM (*(int *) optval); -} -#undef FUNC_NAME - -SCM_DEFINE (scm_setsockopt, "setsockopt", 4, 0, 0, - (SCM sock, SCM level, SCM optname, SCM value), -"Sets the value of a particular socket option for the socket -port @var{socket}. @var{level} is an integer code for type of option -being set, e.g., @code{SOL_SOCKET} for socket-level options. -@var{optname} is an -integer code for the option to set and should be specified using one of -the symbols @code{SO_DEBUG}, @code{SO_REUSEADDR} etc. -@var{value} is the value to which the option should be set. For -most options this must be an integer, but for @code{SO_LINGER} it must -be a pair. - -The return value is unspecified.") -#define FUNC_NAME s_scm_setsockopt -{ - int fd; - int optlen; -#ifdef HAVE_STRUCT_LINGER - char optval[sizeof (struct linger)]; /* Biggest option :-( */ -#else - char optval[sizeof (scm_sizet)]; -#endif - int ilevel, ioptname; - sock = SCM_COERCE_OUTPORT (sock); - SCM_VALIDATE_OPFPORT (1,sock); - SCM_VALIDATE_INUM_COPY (2,level,ilevel); - SCM_VALIDATE_INUM_COPY (3,optname,ioptname); - fd = SCM_FPORT_FDES (sock); - if (0); -#ifdef SO_LINGER - else if (ilevel == SOL_SOCKET && ioptname == SO_LINGER) - { -#ifdef HAVE_STRUCT_LINGER - struct linger ling; - SCM_ASSERT (SCM_CONSP (value) - && SCM_INUMP (SCM_CAR (value)) - && SCM_INUMP (SCM_CDR (value)), - value, SCM_ARG4, FUNC_NAME); - ling.l_onoff = SCM_INUM (SCM_CAR (value)); - ling.l_linger = SCM_INUM (SCM_CDR (value)); - optlen = (int) sizeof (struct linger); - memcpy (optval, (void *) &ling, optlen); -#else - scm_sizet ling; - SCM_ASSERT (SCM_CONSP (value) - && SCM_INUMP (SCM_CAR (value)) - && SCM_INUMP (SCM_CDR (value)), - value, SCM_ARG4, FUNC_NAME); - ling = SCM_INUM (SCM_CAR (value)); - optlen = (int) sizeof (scm_sizet); - (*(scm_sizet *) optval) = (scm_sizet) SCM_INUM (value); -#endif - } -#endif -#ifdef SO_SNDBUF - else if (ilevel == SOL_SOCKET && ioptname == SO_SNDBUF) - { - SCM_VALIDATE_INUM (4,value); - optlen = (int) sizeof (scm_sizet); - (*(scm_sizet *) optval) = (scm_sizet) SCM_INUM (value); - } -#endif -#ifdef SO_RCVBUF - else if (ilevel == SOL_SOCKET && ioptname == SO_RCVBUF) - { - SCM_VALIDATE_INUM (4,value); - optlen = (int) sizeof (scm_sizet); - (*(scm_sizet *) optval) = (scm_sizet) SCM_INUM (value); - } -#endif - else - { - /* Most options just take an int. */ - SCM_VALIDATE_INUM (4,value); - optlen = (int) sizeof (int); - (*(int *) optval) = (int) SCM_INUM (value); - } - if (setsockopt (fd, ilevel, ioptname, (void *) optval, optlen) == -1) - SCM_SYSERROR; - return SCM_UNSPECIFIED; -} -#undef FUNC_NAME - -SCM_DEFINE (scm_shutdown, "shutdown", 2, 0, 0, - (SCM sock, SCM how), -"Sockets can be closed simply by using @code{close-port}. The -@code{shutdown} procedure allows reception or tranmission on a -connection to be shut down individually, according to the parameter -@var{how}: - -@table @asis -@item 0 -Stop receiving data for this socket. If further data arrives, reject it. -@item 1 -Stop trying to transmit data from this socket. Discard any -data waiting to be sent. Stop looking for acknowledgement of -data already sent; don't retransmit it if it is lost. -@item 2 -Stop both reception and transmission. -@end table - -The return value is unspecified.") -#define FUNC_NAME s_scm_shutdown -{ - int fd; - sock = SCM_COERCE_OUTPORT (sock); - SCM_VALIDATE_OPFPORT (1,sock); - SCM_VALIDATE_INUM (2,how); - SCM_ASSERT_RANGE(2,how,0 <= SCM_INUM (how) && 2 >= SCM_INUM (how)); - fd = SCM_FPORT_FDES (sock); - if (shutdown (fd, SCM_INUM (how)) == -1) - SCM_SYSERROR; - return SCM_UNSPECIFIED; -} -#undef FUNC_NAME - -/* convert fam/address/args into a sockaddr of the appropriate type. - args is modified by removing the arguments actually used. - which_arg and proc are used when reporting errors: - which_arg is the position of address in the original argument list. - proc is the name of the original procedure. - size returns the size of the structure allocated. */ - - -static struct sockaddr * -scm_fill_sockaddr (int fam,SCM address,SCM *args,int which_arg,const char *proc,scm_sizet *size) -{ - switch (fam) - { - case AF_INET: - { - SCM isport; - struct sockaddr_in *soka; - - soka = (struct sockaddr_in *) - scm_must_malloc (sizeof (struct sockaddr_in), proc); - /* e.g., for BSDs which don't like invalid sin_len. */ - memset (soka, 0, sizeof (struct sockaddr_in)); - soka->sin_family = AF_INET; - soka->sin_addr.s_addr = - htonl (scm_num2ulong (address, (char *) which_arg, proc)); - SCM_ASSERT (SCM_CONSP (*args), *args, - which_arg + 1, proc); - isport = SCM_CAR (*args); - *args = SCM_CDR (*args); - SCM_ASSERT (SCM_INUMP (isport), isport, which_arg + 1, proc); - soka->sin_port = htons (SCM_INUM (isport)); - *size = sizeof (struct sockaddr_in); - return (struct sockaddr *) soka; - } -#ifdef HAVE_UNIX_DOMAIN_SOCKETS - case AF_UNIX: - { - struct sockaddr_un *soka; - - soka = (struct sockaddr_un *) - scm_must_malloc (sizeof (struct sockaddr_un), proc); - memset (soka, 0, sizeof (struct sockaddr_un)); - soka->sun_family = AF_UNIX; - SCM_ASSERT (SCM_ROSTRINGP (address), address, - which_arg, proc); - memcpy (soka->sun_path, SCM_ROCHARS (address), - 1 + SCM_ROLENGTH (address)); - *size = sizeof (struct sockaddr_un); - return (struct sockaddr *) soka; - } -#endif - default: - scm_out_of_range (proc, SCM_MAKINUM (fam)); - } -} - -SCM_DEFINE (scm_connect, "connect", 3, 0, 1, - (SCM sock, SCM fam, SCM address, SCM args), -"Initiates a connection from @var{socket} to the address -specified by @var{address} and possibly @var{arg @dots{}}. The format -required for @var{address} -and @var{arg} @dots{} depends on the family of the socket. - -For a socket of family @code{AF_UNIX}, -only @code{address} is specified and must be a string with the -filename where the socket is to be created. - -For a socket of family @code{AF_INET}, -@code{address} must be an integer Internet host address and @var{arg} @dots{} -must be a single integer port number. - -The return value is unspecified.") -#define FUNC_NAME s_scm_connect -{ - int fd; - struct sockaddr *soka; - scm_sizet size; - - sock = SCM_COERCE_OUTPORT (sock); - SCM_VALIDATE_OPFPORT (1,sock); - SCM_VALIDATE_INUM (2,fam); - fd = SCM_FPORT_FDES (sock); - soka = scm_fill_sockaddr (SCM_INUM (fam), address, &args, 3, FUNC_NAME, &size); - if (connect (fd, soka, size) == -1) - SCM_SYSERROR; - scm_must_free ((char *) soka); - return SCM_UNSPECIFIED; -} -#undef FUNC_NAME - -SCM_DEFINE (scm_bind, "bind", 3, 0, 1, - (SCM sock, SCM fam, SCM address, SCM args), -"Assigns an address to the socket port @var{socket}. -Generally this only needs to be done for server sockets, -so they know where to look for incoming connections. A socket -without an address will be assigned one automatically when it -starts communicating. - -The format of @var{address} and @var{ARG} @dots{} depends on the family -of the socket. - -For a socket of family @code{AF_UNIX}, only @var{address} -is specified and must -be a string with the filename where the socket is to be created. - -For a socket of family @code{AF_INET}, @var{address} must be an integer -Internet host address and @var{arg} @dots{} must be a single integer -port number. - -The values of the following variables can also be used for @var{address}: - -@defvar INADDR_ANY -Allow connections from any address. -@end defvar - -@defvar INADDR_LOOPBACK -The address of the local host using the loopback device. -@end defvar - -@defvar INADDR_BROADCAST -The broadcast address on the local network. -@end defvar - -@defvar INADDR_NONE -No address. -@end defvar - -The return value is unspecified.") -#define FUNC_NAME s_scm_bind -{ - int rv; - struct sockaddr *soka; - scm_sizet size; - int fd; - - sock = SCM_COERCE_OUTPORT (sock); - SCM_VALIDATE_OPFPORT (1,sock); - SCM_VALIDATE_INUM (2,fam); - soka = scm_fill_sockaddr (SCM_INUM (fam), address, &args, 3, FUNC_NAME, &size); - fd = SCM_FPORT_FDES (sock); - rv = bind (fd, soka, size); - if (rv == -1) - SCM_SYSERROR; - scm_must_free ((char *) soka); - return SCM_UNSPECIFIED; -} -#undef FUNC_NAME - -SCM_DEFINE (scm_listen, "listen", 2, 0, 0, - (SCM sock, SCM backlog), -"This procedure enables @var{socket} to accept connection -requests. @var{backlog} is an integer specifying -the maximum length of the queue for pending connections. -If the queue fills, new clients will fail to connect until the -server calls @code{accept} to accept a connection from the queue. - -The return value is unspecified.") -#define FUNC_NAME s_scm_listen -{ - int fd; - sock = SCM_COERCE_OUTPORT (sock); - SCM_VALIDATE_OPFPORT (1,sock); - SCM_VALIDATE_INUM (2,backlog); - fd = SCM_FPORT_FDES (sock); - if (listen (fd, SCM_INUM (backlog)) == -1) - SCM_SYSERROR; - return SCM_UNSPECIFIED; -} -#undef FUNC_NAME - -/* Put the components of a sockaddr into a new SCM vector. */ - -static SCM -scm_addr_vector (struct sockaddr *address,const char *proc) -{ - short int fam = address->sa_family; - SCM result; - SCM *ve; -#ifdef HAVE_UNIX_DOMAIN_SOCKETS - if (fam == AF_UNIX) - { - struct sockaddr_un *nad = (struct sockaddr_un *) address; - result = scm_make_vector (SCM_MAKINUM (2), SCM_UNSPECIFIED); - ve = SCM_VELTS (result); - ve[0] = scm_ulong2num ((unsigned long) fam); - ve[1] = scm_makfromstr (nad->sun_path, - (scm_sizet) strlen (nad->sun_path), 0); - } - else -#endif - if (fam == AF_INET) - { - struct sockaddr_in *nad = (struct sockaddr_in *) address; - result = scm_make_vector (SCM_MAKINUM (3), SCM_UNSPECIFIED); - ve = SCM_VELTS (result); - ve[0] = scm_ulong2num ((unsigned long) fam); - ve[1] = scm_ulong2num (ntohl (nad->sin_addr.s_addr)); - ve[2] = scm_ulong2num ((unsigned long) ntohs (nad->sin_port)); - } - else - scm_misc_error (proc, "Unrecognised address family: %s", - scm_listify (SCM_MAKINUM (fam), SCM_UNDEFINED)); - - return result; -} - -/* Allocate a buffer large enough to hold any sockaddr type. */ -static char *scm_addr_buffer; -static int scm_addr_buffer_size; - -static void -scm_init_addr_buffer (void) -{ - scm_addr_buffer_size = -#ifdef HAVE_UNIX_DOMAIN_SOCKETS - (int) sizeof (struct sockaddr_un) -#else - 0 -#endif - ; - if (sizeof (struct sockaddr_in) > scm_addr_buffer_size) - scm_addr_buffer_size = (int) sizeof (struct sockaddr_in); - scm_addr_buffer = scm_must_malloc (scm_addr_buffer_size, "address buffer"); -} - -SCM_DEFINE (scm_accept, "accept", 1, 0, 0, - (SCM sock), -"Accepts a connection on a bound, listening socket @var{socket}. If there -are no pending connections in the queue, it waits until -one is available unless the non-blocking option has been set on the -socket. - -The return value is a -pair in which the CAR is a new socket port for the connection and -the CDR is an object with address information about the client which -initiated the connection. - -If the address is not available then the CDR will be an empty vector. - -@var{socket} does not become part of the -connection and will continue to accept new requests.") -#define FUNC_NAME s_scm_accept -{ - int fd; - int newfd; - SCM address; - SCM newsock; - - int tmp_size; - sock = SCM_COERCE_OUTPORT (sock); - SCM_VALIDATE_OPFPORT (1,sock); - fd = SCM_FPORT_FDES (sock); - tmp_size = scm_addr_buffer_size; - newfd = accept (fd, (struct sockaddr *) scm_addr_buffer, &tmp_size); - newsock = scm_sock_fd_to_port (newfd, FUNC_NAME); - if (tmp_size > 0) - address = scm_addr_vector ((struct sockaddr *) scm_addr_buffer, FUNC_NAME); - else - address = SCM_BOOL_F; - - return scm_cons (newsock, address); -} -#undef FUNC_NAME - -SCM_DEFINE (scm_getsockname, "getsockname", 1, 0, 0, - (SCM sock), -"Returns the address of @var{socket}, in the same form as the object -returned by @code{accept}. On many systems the address of a socket -in the @code{AF_FILE} namespace cannot be read.") -#define FUNC_NAME s_scm_getsockname -{ - int tmp_size; - int fd; - SCM result; - sock = SCM_COERCE_OUTPORT (sock); - SCM_VALIDATE_OPFPORT (1,sock); - fd = SCM_FPORT_FDES (sock); - tmp_size = scm_addr_buffer_size; - if (getsockname (fd, (struct sockaddr *) scm_addr_buffer, &tmp_size) == -1) - SCM_SYSERROR; - if (tmp_size > 0) - result = scm_addr_vector ((struct sockaddr *) scm_addr_buffer, FUNC_NAME); - else - result = SCM_BOOL_F; - return result; -} -#undef FUNC_NAME - -SCM_DEFINE (scm_getpeername, "getpeername", 1, 0, 0, - (SCM sock), -"Returns the address of the socket that the socket @var{socket} is connected to, -in the same form as the object -returned by @code{accept}. On many systems the address of a socket -in the @code{AF_FILE} namespace cannot be read.") -#define FUNC_NAME s_scm_getpeername -{ - int tmp_size; - int fd; - SCM result; - sock = SCM_COERCE_OUTPORT (sock); - SCM_VALIDATE_OPFPORT (1,sock); - fd = SCM_FPORT_FDES (sock); - tmp_size = scm_addr_buffer_size; - if (getpeername (fd, (struct sockaddr *) scm_addr_buffer, &tmp_size) == -1) - SCM_SYSERROR; - if (tmp_size > 0) - result = scm_addr_vector ((struct sockaddr *) scm_addr_buffer, FUNC_NAME); - else - result = SCM_BOOL_F; - return result; -} -#undef FUNC_NAME - -SCM_DEFINE (scm_recv, "recv!", 2, 1, 0, - (SCM sock, SCM buf, SCM flags), -"Receives data from the socket port @var{socket}. @var{socket} must already -be bound to the address from which data is to be received. -@var{buf} is a string into which -the data will be written. The size of @var{buf} limits the amount of -data which can be received: in the case of packet -protocols, if a packet larger than this limit is encountered then some data -will be irrevocably lost. - -The optional @var{flags} argument is a value or -bitwise OR of MSG_OOB, MSG_PEEK, MSG_DONTROUTE etc. - -The value returned is the number of bytes read from the socket. - -Note that the data is read directly from the socket file descriptor: -any unread buffered port data is ignored.") -#define FUNC_NAME s_scm_recv -{ - int rv; - int fd; - int flg; - - SCM_VALIDATE_OPFPORT (1,sock); - SCM_VALIDATE_STRING (2,buf); - SCM_VALIDATE_INUM_DEF_COPY (3,flags,0,flg); - fd = SCM_FPORT_FDES (sock); - - SCM_SYSCALL (rv = recv (fd, SCM_CHARS (buf), SCM_LENGTH (buf), flg)); - if (rv == -1) - SCM_SYSERROR; - - return SCM_MAKINUM (rv); -} -#undef FUNC_NAME - -SCM_DEFINE (scm_send, "send", 2, 1, 0, - (SCM sock, SCM message, SCM flags), -"Transmits the string @var{message} on the socket port @var{socket}. -@var{socket} must already be bound to a destination address. The -value returned is the number of bytes transmitted -- it's possible for -this to be less than the length of @var{message} if the socket is -set to be non-blocking. The optional @var{flags} argument is a value or -bitwise OR of MSG_OOB, MSG_PEEK, MSG_DONTROUTE etc. - -Note that the data is written directly to the socket file descriptor: -any unflushed buffered port data is ignored.") -#define FUNC_NAME s_scm_send -{ - int rv; - int fd; - int flg; - - sock = SCM_COERCE_OUTPORT (sock); - SCM_VALIDATE_OPFPORT (1,sock); - SCM_VALIDATE_ROSTRING (2,message); - SCM_VALIDATE_INUM_DEF_COPY (3,flags,0,flg); - fd = SCM_FPORT_FDES (sock); - - SCM_SYSCALL (rv = send (fd, SCM_ROCHARS (message), SCM_ROLENGTH (message), flg)); - if (rv == -1) - SCM_SYSERROR; - return SCM_MAKINUM (rv); -} -#undef FUNC_NAME - -SCM_DEFINE (scm_recvfrom, "recvfrom!", 2, 3, 0, - (SCM sock, SCM buf, SCM flags, SCM start, SCM end), -"Returns data from the socket port @var{socket} and also information about -where the data was received from. @var{socket} must already -be bound to the address from which data is to be received. -@code{buf}, is a string into which -the data will be written. The size of @var{buf} limits the amount of -data which can be received: in the case of packet -protocols, if a packet larger than this limit is encountered then some data -will be irrevocably lost. - -The optional @var{flags} argument is a value or -bitwise OR of MSG_OOB, MSG_PEEK, MSG_DONTROUTE etc. - -The value returned is a pair: the CAR is the number of bytes read from -the socket and the CDR an address object in the same form as returned by -@code{accept}. - -The @var{start} and @var{end} arguments specify a substring of @var{buf} -to which the data should be written. - -Note that the data is read directly from the socket file descriptor: -any unread buffered port data is ignored.") -#define FUNC_NAME s_scm_recvfrom -{ - int rv; - int fd; - int flg; - int offset = 0; - int cend; - int tmp_size; - SCM address; - - SCM_VALIDATE_OPFPORT (1,sock); - SCM_VALIDATE_STRING (2,buf); - cend = SCM_LENGTH (buf); - - if (SCM_UNBNDP (flags)) - flg = 0; - else - { - flg = SCM_NUM2ULONG (3,flags); - - if (!SCM_UNBNDP (start)) - { - offset = (int) SCM_NUM2LONG (4,start); - - if (offset < 0 || offset >= cend) - SCM_OUT_OF_RANGE (4, start); - - if (!SCM_UNBNDP (end)) - { - int tend = (int) SCM_NUM2LONG (5,end); - - if (tend <= offset || tend > cend) - SCM_OUT_OF_RANGE (5, end); - - cend = tend; - } - } - } - - fd = SCM_FPORT_FDES (sock); - - tmp_size = scm_addr_buffer_size; - SCM_SYSCALL (rv = recvfrom (fd, SCM_CHARS (buf) + offset, - cend - offset, flg, - (struct sockaddr *) scm_addr_buffer, - &tmp_size)); - if (rv == -1) - SCM_SYSERROR; - if (tmp_size > 0) - address = scm_addr_vector ((struct sockaddr *) scm_addr_buffer, FUNC_NAME); - else - address = SCM_BOOL_F; - - return scm_cons (SCM_MAKINUM (rv), address); -} -#undef FUNC_NAME - -SCM_DEFINE (scm_sendto, "sendto", 4, 0, 1, - (SCM sock, SCM message, SCM fam, SCM address, SCM args_and_flags), -"Transmits the string @var{message} on the socket port @var{socket}. The -destination address is specified using the @var{family}, @var{address} and -@var{arg} arguments, in a similar way to the @code{connect} -procedure. The -value returned is the number of bytes transmitted -- it's possible for -this to be less than the length of @var{message} if the socket is -set to be non-blocking. The optional @var{flags} argument is a value or -bitwise OR of MSG_OOB, MSG_PEEK, MSG_DONTROUTE etc. - -Note that the data is written directly to the socket file descriptor: -any unflushed buffered port data is ignored.") -#define FUNC_NAME s_scm_sendto -{ - int rv; - int fd; - int flg; - struct sockaddr *soka; - scm_sizet size; - int save_err; - - sock = SCM_COERCE_OUTPORT (sock); - SCM_VALIDATE_FPORT (1,sock); - SCM_VALIDATE_ROSTRING (2,message); - SCM_VALIDATE_INUM (3,fam); - fd = SCM_FPORT_FDES (sock); - soka = scm_fill_sockaddr (SCM_INUM (fam), address, &args_and_flags, 4, - FUNC_NAME, &size); - if (SCM_NULLP (args_and_flags)) - flg = 0; - else - { - SCM_VALIDATE_CONS (5,args_and_flags); - flg = SCM_NUM2ULONG (5,SCM_CAR (args_and_flags)); - } - SCM_SYSCALL (rv = sendto (fd, SCM_ROCHARS (message), SCM_ROLENGTH (message), - flg, soka, size)); - save_err = errno; - scm_must_free ((char *) soka); - errno = save_err; - if (rv == -1) - SCM_SYSERROR; - return SCM_MAKINUM (rv); -} -#undef FUNC_NAME - - - -void -scm_init_socket () -{ - /* protocol families. */ -#ifdef AF_UNSPEC - scm_sysintern ("AF_UNSPEC", SCM_MAKINUM (AF_UNSPEC)); -#endif -#ifdef AF_UNIX - scm_sysintern ("AF_UNIX", SCM_MAKINUM (AF_UNIX)); -#endif -#ifdef AF_INET - scm_sysintern ("AF_INET", SCM_MAKINUM (AF_INET)); -#endif - -#ifdef PF_UNSPEC - scm_sysintern ("PF_UNSPEC", SCM_MAKINUM (PF_UNSPEC)); -#endif -#ifdef PF_UNIX - scm_sysintern ("PF_UNIX", SCM_MAKINUM (PF_UNIX)); -#endif -#ifdef PF_INET - scm_sysintern ("PF_INET", SCM_MAKINUM (PF_INET)); -#endif - - /* socket types. */ -#ifdef SOCK_STREAM - scm_sysintern ("SOCK_STREAM", SCM_MAKINUM (SOCK_STREAM)); -#endif -#ifdef SOCK_DGRAM - scm_sysintern ("SOCK_DGRAM", SCM_MAKINUM (SOCK_DGRAM)); -#endif -#ifdef SOCK_RAW - scm_sysintern ("SOCK_RAW", SCM_MAKINUM (SOCK_RAW)); -#endif - - /* setsockopt level. */ -#ifdef SOL_SOCKET - scm_sysintern ("SOL_SOCKET", SCM_MAKINUM (SOL_SOCKET)); -#endif -#ifdef SOL_IP - scm_sysintern ("SOL_IP", SCM_MAKINUM (SOL_IP)); -#endif -#ifdef SOL_TCP - scm_sysintern ("SOL_TCP", SCM_MAKINUM (SOL_TCP)); -#endif -#ifdef SOL_UDP - scm_sysintern ("SOL_UDP", SCM_MAKINUM (SOL_UDP)); -#endif - - /* setsockopt names. */ -#ifdef SO_DEBUG - scm_sysintern ("SO_DEBUG", SCM_MAKINUM (SO_DEBUG)); -#endif -#ifdef SO_REUSEADDR - scm_sysintern ("SO_REUSEADDR", SCM_MAKINUM (SO_REUSEADDR)); -#endif -#ifdef SO_STYLE - scm_sysintern ("SO_STYLE", SCM_MAKINUM (SO_STYLE)); -#endif -#ifdef SO_TYPE - scm_sysintern ("SO_TYPE", SCM_MAKINUM (SO_TYPE)); -#endif -#ifdef SO_ERROR - scm_sysintern ("SO_ERROR", SCM_MAKINUM (SO_ERROR)); -#endif -#ifdef SO_DONTROUTE - scm_sysintern ("SO_DONTROUTE", SCM_MAKINUM (SO_DONTROUTE)); -#endif -#ifdef SO_BROADCAST - scm_sysintern ("SO_BROADCAST", SCM_MAKINUM (SO_BROADCAST)); -#endif -#ifdef SO_SNDBUF - scm_sysintern ("SO_SNDBUF", SCM_MAKINUM (SO_SNDBUF)); -#endif -#ifdef SO_RCVBUF - scm_sysintern ("SO_RCVBUF", SCM_MAKINUM (SO_RCVBUF)); -#endif -#ifdef SO_KEEPALIVE - scm_sysintern ("SO_KEEPALIVE", SCM_MAKINUM (SO_KEEPALIVE)); -#endif -#ifdef SO_OOBINLINE - scm_sysintern ("SO_OOBINLINE", SCM_MAKINUM (SO_OOBINLINE)); -#endif -#ifdef SO_NO_CHECK - scm_sysintern ("SO_NO_CHECK", SCM_MAKINUM (SO_NO_CHECK)); -#endif -#ifdef SO_PRIORITY - scm_sysintern ("SO_PRIORITY", SCM_MAKINUM (SO_PRIORITY)); -#endif -#ifdef SO_LINGER - scm_sysintern ("SO_LINGER", SCM_MAKINUM (SO_LINGER)); -#endif - - /* recv/send options. */ -#ifdef MSG_OOB - scm_sysintern ("MSG_OOB", SCM_MAKINUM (MSG_OOB)); -#endif -#ifdef MSG_PEEK - scm_sysintern ("MSG_PEEK", SCM_MAKINUM (MSG_PEEK)); -#endif -#ifdef MSG_DONTROUTE - scm_sysintern ("MSG_DONTROUTE", SCM_MAKINUM (MSG_DONTROUTE)); -#endif - - scm_add_feature ("socket"); - scm_init_addr_buffer (); - -#include "socket.x" -} - +/* Copyright (C) 1996,1997,1998,2000,2001 Free Software Foundation, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this software; see the file COPYING. If not, write to + * the Free Software Foundation, Inc., 59 Temple Place, Suite 330, + * Boston, MA 02111-1307 USA + * + * As a special exception, the Free Software Foundation gives permission + * for additional uses of the text contained in its release of GUILE. + * + * The exception is that, if you link the GUILE library with other files + * to produce an executable, this does not by itself cause the + * resulting executable to be covered by the GNU General Public License. + * Your use of that executable is in no way restricted on account of + * linking the GUILE library code into it. + * + * This exception does not however invalidate any other reasons why + * the executable file might be covered by the GNU General Public License. + * + * This exception applies only to the code released by the + * Free Software Foundation under the name GUILE. If you copy + * code from other Free Software Foundation releases into a copy of + * GUILE, as the General Public License permits, the exception does + * not apply to the code that you add in this way. To avoid misleading + * anyone as to the status of such modified files, you must delete + * this exception notice from them. + * + * If you write modifications of your own for GUILE, it is your choice + * whether to permit this exception to apply to your modifications. + * If you do not wish that, delete this exception notice. */ + +/* Software engineering face-lift by Greg J. Badros, 11-Dec-1999, + gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */ + + + +#include + +#include "libguile/_scm.h" +#include "libguile/unif.h" +#include "libguile/feature.h" +#include "libguile/fports.h" +#include "libguile/strings.h" +#include "libguile/vectors.h" + +#include "libguile/validate.h" +#include "libguile/socket.h" + +#ifdef HAVE_STRING_H +#include +#endif +#ifdef HAVE_UNISTD_H +#include +#endif +#include +#include +#ifdef HAVE_UNIX_DOMAIN_SOCKETS +#include +#endif +#include +#include +#include + +#if defined (HAVE_UNIX_DOMAIN_SOCKETS) && !defined (SUN_LEN) +#define SUN_LEN(ptr) ((size_t) (((struct sockaddr_un *) 0)->sun_path) \ + + strlen ((ptr)->sun_path)) +#endif + +#if !defined (HAVE_UINT32_T) +#if SIZEOF_INT == 4 +typedef unsigned int uint32_t; +#elif SIZEOF_LONG == 4 +typedef unsigned long uint32_t; +#else +#error can not define uint32_t +#endif +#endif + +/* we are not currently using socklen_t. it's not defined on all systems, + so would need to be checked by configure. in the meantime, plain + int is the best alternative. */ + + + +SCM_DEFINE (scm_htons, "htons", 1, 0, 0, + (SCM value), + "Convert a 16 bit quantity from host to network byte ordering.\n" + "@var{value} is packed into 2 bytes, which are then converted\n" + "and returned as a new integer.") +#define FUNC_NAME s_scm_htons +{ + unsigned short c_in; + + SCM_VALIDATE_INUM_COPY (1, value, c_in); + if (c_in != SCM_INUM (value)) + SCM_OUT_OF_RANGE (1, value); + + return SCM_MAKINUM (htons (c_in)); +} +#undef FUNC_NAME + +SCM_DEFINE (scm_ntohs, "ntohs", 1, 0, 0, + (SCM value), + "Convert a 16 bit quantity from network to host byte ordering.\n" + "@var{value} is packed into 2 bytes, which are then converted\n" + "and returned as a new integer.") +#define FUNC_NAME s_scm_ntohs +{ + unsigned short c_in; + + SCM_VALIDATE_INUM_COPY (1, value, c_in); + if (c_in != SCM_INUM (value)) + SCM_OUT_OF_RANGE (1, value); + + return SCM_MAKINUM (ntohs (c_in)); +} +#undef FUNC_NAME + +SCM_DEFINE (scm_htonl, "htonl", 1, 0, 0, + (SCM value), + "Convert a 32 bit quantity from host to network byte ordering.\n" + "@var{value} is packed into 4 bytes, which are then converted\n" + "and returned as a new integer.") +#define FUNC_NAME s_scm_htonl +{ + uint32_t c_in = SCM_NUM2ULONG (1, value); + + return scm_ulong2num (htonl (c_in)); +} +#undef FUNC_NAME + +SCM_DEFINE (scm_ntohl, "ntohl", 1, 0, 0, + (SCM value), + "Convert a 32 bit quantity from network to host byte ordering.\n" + "@var{value} is packed into 4 bytes, which are then converted\n" + "and returned as a new integer.") +#define FUNC_NAME s_scm_ntohl +{ + uint32_t c_in = SCM_NUM2ULONG (1, value); + + return scm_ulong2num (ntohl (c_in)); +} +#undef FUNC_NAME + +#ifndef HAVE_INET_ATON +/* for our definition in inet_aton.c, not usually needed. */ +extern int inet_aton (); +#endif + +SCM_DEFINE (scm_inet_aton, "inet-aton", 1, 0, 0, + (SCM address), + "Convert an IPv4 Internet address from printable string\n" + "(dotted decimal notation) to an integer. E.g.,\n\n" + "@lisp\n" + "(inet-aton \"127.0.0.1\") @result{} 2130706433\n" + "@end lisp") +#define FUNC_NAME s_scm_inet_aton +{ + struct in_addr soka; + + SCM_VALIDATE_STRING (1, address); + SCM_STRING_COERCE_0TERMINATION_X (address); + if (inet_aton (SCM_STRING_CHARS (address), &soka) == 0) + SCM_MISC_ERROR ("bad address", SCM_EOL); + return scm_ulong2num (ntohl (soka.s_addr)); +} +#undef FUNC_NAME + + +SCM_DEFINE (scm_inet_ntoa, "inet-ntoa", 1, 0, 0, + (SCM inetid), + "Convert an IPv4 Internet address to a printable\n" + "(dotted decimal notation) string. E.g.,\n\n" + "@lisp\n" + "(inet-ntoa 2130706433) @result{} \"127.0.0.1\"\n" + "@end lisp") +#define FUNC_NAME s_scm_inet_ntoa +{ + struct in_addr addr; + char *s; + SCM answer; + addr.s_addr = htonl (SCM_NUM2ULONG (1, inetid)); + s = inet_ntoa (addr); + answer = scm_makfromstr (s, strlen (s), 0); + return answer; +} +#undef FUNC_NAME + +#ifdef HAVE_INET_NETOF +SCM_DEFINE (scm_inet_netof, "inet-netof", 1, 0, 0, + (SCM address), + "Return the network number part of the given IPv4\n" + "Internet address. E.g.,\n\n" + "@lisp\n" + "(inet-netof 2130706433) @result{} 127\n" + "@end lisp") +#define FUNC_NAME s_scm_inet_netof +{ + struct in_addr addr; + addr.s_addr = htonl (SCM_NUM2ULONG (1, address)); + return scm_ulong2num ((unsigned long) inet_netof (addr)); +} +#undef FUNC_NAME +#endif + +#ifdef HAVE_INET_LNAOF +SCM_DEFINE (scm_lnaof, "inet-lnaof", 1, 0, 0, + (SCM address), + "Return the local-address-with-network part of the given\n" + "IPv4 Internet address, using the obsolete class A/B/C system.\n" + "E.g.,\n\n" + "@lisp\n" + "(inet-lnaof 2130706433) @result{} 1\n" + "@end lisp") +#define FUNC_NAME s_scm_lnaof +{ + struct in_addr addr; + addr.s_addr = htonl (SCM_NUM2ULONG (1, address)); + return scm_ulong2num ((unsigned long) inet_lnaof (addr)); +} +#undef FUNC_NAME +#endif + +#ifdef HAVE_INET_MAKEADDR +SCM_DEFINE (scm_inet_makeaddr, "inet-makeaddr", 2, 0, 0, + (SCM net, SCM lna), + "Make an IPv4 Internet address by combining the network number\n" + "@var{net} with the local-address-within-network number\n" + "@var{lna}. E.g.,\n\n" + "@lisp\n" + "(inet-makeaddr 127 1) @result{} 2130706433\n" + "@end lisp") +#define FUNC_NAME s_scm_inet_makeaddr +{ + struct in_addr addr; + unsigned long netnum; + unsigned long lnanum; + + netnum = SCM_NUM2ULONG (1, net); + lnanum = SCM_NUM2ULONG (2, lna); + addr = inet_makeaddr (netnum, lnanum); + return scm_ulong2num (ntohl (addr.s_addr)); +} +#undef FUNC_NAME +#endif + +#ifdef HAVE_IPV6 + +/* flip a 128 bit IPv6 address between host and network order. */ +#ifdef WORDS_BIGENDIAN +#define FLIP_NET_HOST_128(addr) +#else +#define FLIP_NET_HOST_128(addr)\ +{\ + int i;\ + \ + for (i = 0; i < 8; i++)\ + {\ + char c = (addr)[i];\ + \ + (addr)[i] = (addr)[15 - i];\ + (addr)[15 - i] = c;\ + }\ +} +#endif + +/* convert a 128 bit IPv6 address in network order to a host ordered + SCM integer. */ +static SCM ipv6_net_to_num (const char *src) +{ + int big_digits = 128 / SCM_BITSPERDIG; + const int bytes_per_dig = SCM_BITSPERDIG / 8; + char addr[16]; + char *ptr = addr; + SCM result; + + memcpy (addr, src, 16); + /* get rid of leading zeros. */ + while (big_digits > 0) + { + long test = 0; + + memcpy (&test, ptr, bytes_per_dig); + if (test != 0) + break; + ptr += bytes_per_dig; + big_digits--; + } + FLIP_NET_HOST_128 (addr); + if (big_digits * bytes_per_dig <= sizeof (unsigned long)) + { + /* this is just so that we use INUM where possible. */ + unsigned long l_addr; + + memcpy (&l_addr, addr, sizeof (unsigned long)); + result = scm_ulong2num (l_addr); + } + else + { + result = scm_i_mkbig (big_digits, 0); + memcpy (SCM_BDIGITS (result), addr, big_digits * bytes_per_dig); + } + return result; +} + +/* convert a host ordered SCM integer to a 128 bit IPv6 address in + network order. */ +static void ipv6_num_to_net (SCM src, char *dst) +{ + if (SCM_INUMP (src)) + { + uint32_t addr = htonl (SCM_INUM (src)); + + memset (dst, 0, 12); + memcpy (dst + 12, &addr, 4); + } + else + { + memset (dst, 0, 16); + memcpy (dst, SCM_BDIGITS (src), + SCM_NUMDIGS (src) * (SCM_BITSPERDIG / 8)); + FLIP_NET_HOST_128 (dst); + } +} + +/* check that an SCM variable contains an IPv6 integer address. */ +#define VALIDATE_INET6(which_arg, address)\ + if (SCM_INUMP (address))\ + SCM_ASSERT_RANGE (which_arg, address, SCM_INUM (address) >= 0);\ + else\ + {\ + SCM_VALIDATE_BIGINT (which_arg, address);\ + SCM_ASSERT_RANGE (which_arg, address,\ + !SCM_BIGSIGN (address)\ + && (SCM_BITSPERDIG\ + * SCM_NUMDIGS (address) <= 128));\ + } + +#ifdef HAVE_INET_PTON +SCM_DEFINE (scm_inet_pton, "inet-pton", 2, 0, 0, + (SCM family, SCM address), + "Convert a string containing a printable network address to\n" + "an integer address. Note that unlike the C version of this\n" + "function,\n" + "the result is an integer with normal host byte ordering.\n" + "@var{family} can be @code{AF_INET} or @code{AF_INET6}. E.g.,\n\n" + "@lisp\n" + "(inet-pton AF_INET \"127.0.0.1\") @result{} 2130706433\n" + "(inet-pton AF_INET6 \"::1\") @result{} 1\n" + "@end lisp") +#define FUNC_NAME s_scm_inet_pton +{ + int af; + char *src; + char dst[16]; + int rv; + + SCM_VALIDATE_INUM_COPY (1, family, af); + SCM_ASSERT_RANGE (1, family, af == AF_INET || af == AF_INET6); + SCM_VALIDATE_STRING_COPY (2, address, src); + rv = inet_pton (af, src, dst); + if (rv == -1) + SCM_SYSERROR; + else if (rv == 0) + SCM_MISC_ERROR ("Bad address", SCM_EOL); + if (af == AF_INET) + return scm_ulong2num (ntohl (*(uint32_t *) dst)); + else + return ipv6_net_to_num ((char *) dst); +} +#undef FUNC_NAME +#endif + +#ifdef HAVE_INET_NTOP +SCM_DEFINE (scm_inet_ntop, "inet-ntop", 2, 0, 0, + (SCM family, SCM address), + "Convert a network address into a printable string.\n" + "Note that unlike the C version of this function,\n" + "the input is an integer with normal host byte ordering.\n" + "@var{family} can be @code{AF_INET} or @code{AF_INET6}. E.g.,\n\n" + "@lisp\n" + "(inet-ntop AF_INET 2130706433) @result{} \"127.0.0.1\"\n" + "(inet-ntop AF_INET6 (- (expt 2 128) 1)) @result{}\n" + "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff\n" + "@end lisp") +#define FUNC_NAME s_scm_inet_ntop +{ + int af; +#ifdef INET6_ADDRSTRLEN + char dst[INET6_ADDRSTRLEN]; +#else + char dst[46]; +#endif + char addr6[16]; + + SCM_VALIDATE_INUM_COPY (1, family, af); + SCM_ASSERT_RANGE (1, family, af == AF_INET || af == AF_INET6); + if (af == AF_INET) + *(uint32_t *) addr6 = htonl (SCM_NUM2ULONG (2, address)); + else + { + VALIDATE_INET6 (2, address); + ipv6_num_to_net (address, addr6); + } + if (inet_ntop (af, &addr6, dst, sizeof dst) == NULL) + SCM_SYSERROR; + return scm_makfrom0str (dst); +} +#undef FUNC_NAME +#endif + +#endif /* HAVE_IPV6 */ + +SCM_SYMBOL (sym_socket, "socket"); + +#define SCM_SOCK_FD_TO_PORT(fd) scm_fdes_to_port (fd, "r+0", sym_socket) + +SCM_DEFINE (scm_socket, "socket", 3, 0, 0, + (SCM family, SCM style, SCM proto), + "Return a new socket port of the type specified by @var{family},\n" + "@var{style} and @var{proto}. All three parameters are\n" + "integers. Supported values for @var{family} are\n" + "@code{AF_UNIX}, @code{AF_INET} and @code{AF_INET6}.\n" + "Typical values for @var{style} are @code{SOCK_STREAM},\n" + "@code{SOCK_DGRAM} and @code{SOCK_RAW}.\n\n" + "@var{proto} can be obtained from a protocol name using\n" + "@code{getprotobyname}. A value of zero specifies the default\n" + "protocol, which is usually right.\n\n" + "A single socket port cannot by used for communication until it\n" + "has been connected to another socket.") +#define FUNC_NAME s_scm_socket +{ + int fd; + + SCM_VALIDATE_INUM (1, family); + SCM_VALIDATE_INUM (2, style); + SCM_VALIDATE_INUM (3, proto); + fd = socket (SCM_INUM (family), SCM_INUM (style), SCM_INUM (proto)); + if (fd == -1) + SCM_SYSERROR; + return SCM_SOCK_FD_TO_PORT (fd); +} +#undef FUNC_NAME + +#ifdef HAVE_SOCKETPAIR +SCM_DEFINE (scm_socketpair, "socketpair", 3, 0, 0, + (SCM family, SCM style, SCM proto), + "Return a pair of connected (but unnamed) socket ports of the\n" + "type specified by @var{family}, @var{style} and @var{proto}.\n" + "Many systems support only socket pairs of the @code{AF_UNIX}\n" + "family. Zero is likely to be the only meaningful value for\n" + "@var{proto}.") +#define FUNC_NAME s_scm_socketpair +{ + int fam; + int fd[2]; + + SCM_VALIDATE_INUM (1,family); + SCM_VALIDATE_INUM (2,style); + SCM_VALIDATE_INUM (3,proto); + + fam = SCM_INUM (family); + + if (socketpair (fam, SCM_INUM (style), SCM_INUM (proto), fd) == -1) + SCM_SYSERROR; + + return scm_cons (SCM_SOCK_FD_TO_PORT (fd[0]), SCM_SOCK_FD_TO_PORT (fd[1])); +} +#undef FUNC_NAME +#endif + +SCM_DEFINE (scm_getsockopt, "getsockopt", 3, 0, 0, + (SCM sock, SCM level, SCM optname), + "Return the value of a particular socket option for the socket\n" + "port @var{sock}. @var{level} is an integer code for type of\n" + "option being requested, e.g., @code{SOL_SOCKET} for\n" + "socket-level options. @var{optname} is an integer code for the\n" + "option required and should be specified using one of the\n" + "symbols @code{SO_DEBUG}, @code{SO_REUSEADDR} etc.\n\n" + "The returned value is typically an integer but @code{SO_LINGER}\n" + "returns a pair of integers.") +#define FUNC_NAME s_scm_getsockopt +{ + int fd; + /* size of optval is the largest supported option. */ +#ifdef HAVE_STRUCT_LINGER + char optval[sizeof (struct linger)]; + int optlen = sizeof (struct linger); +#else + char optval[sizeof (size_t)]; + int optlen = sizeof (size_t); +#endif + int ilevel; + int ioptname; + + sock = SCM_COERCE_OUTPORT (sock); + SCM_VALIDATE_OPFPORT (1, sock); + SCM_VALIDATE_INUM_COPY (2, level, ilevel); + SCM_VALIDATE_INUM_COPY (3, optname, ioptname); + + fd = SCM_FPORT_FDES (sock); + if (getsockopt (fd, ilevel, ioptname, (void *) optval, &optlen) == -1) + SCM_SYSERROR; + + if (ilevel == SOL_SOCKET) + { +#ifdef SO_LINGER + if (ioptname == SO_LINGER) + { +#ifdef HAVE_STRUCT_LINGER + struct linger *ling = (struct linger *) optval; + + return scm_cons (scm_long2num (ling->l_onoff), + scm_long2num (ling->l_linger)); +#else + return scm_cons (scm_long2num (*(int *) optval) + SCM_MAKINUM (0)); +#endif + } + else +#endif + if (0 +#ifdef SO_SNDBUF + || ioptname == SO_SNDBUF +#endif +#ifdef SO_RCVBUF + || ioptname == SO_RCVBUF +#endif + ) + { + return scm_long2num (*(size_t *) optval); + } + } + return scm_long2num (*(int *) optval); +} +#undef FUNC_NAME + +SCM_DEFINE (scm_setsockopt, "setsockopt", 4, 0, 0, + (SCM sock, SCM level, SCM optname, SCM value), + "Set the value of a particular socket option for the socket\n" + "port @var{sock}. @var{level} is an integer code for type of option\n" + "being set, e.g., @code{SOL_SOCKET} for socket-level options.\n" + "@var{optname} is an\n" + "integer code for the option to set and should be specified using one of\n" + "the symbols @code{SO_DEBUG}, @code{SO_REUSEADDR} etc.\n" + "@var{value} is the value to which the option should be set. For\n" + "most options this must be an integer, but for @code{SO_LINGER} it must\n" + "be a pair.\n\n" + "The return value is unspecified.") +#define FUNC_NAME s_scm_setsockopt +{ + int fd; + int optlen = -1; + /* size of optval is the largest supported option. */ +#ifdef HAVE_STRUCT_LINGER + char optval[sizeof (struct linger)]; +#else + char optval[sizeof (size_t)]; +#endif + int ilevel, ioptname; + + sock = SCM_COERCE_OUTPORT (sock); + + SCM_VALIDATE_OPFPORT (1, sock); + SCM_VALIDATE_INUM_COPY (2, level, ilevel); + SCM_VALIDATE_INUM_COPY (3, optname, ioptname); + + fd = SCM_FPORT_FDES (sock); + + if (ilevel == SOL_SOCKET) + { +#ifdef SO_LINGER + if (ioptname == SO_LINGER) + { +#ifdef HAVE_STRUCT_LINGER + struct linger ling; + long lv; + + SCM_ASSERT (SCM_CONSP (value), value, SCM_ARG4, FUNC_NAME); + lv = SCM_NUM2LONG (4, SCM_CAR (value)); + ling.l_onoff = (int) lv; + SCM_ASSERT_RANGE (SCM_ARG4, value, ling.l_onoff == lv); + lv = SCM_NUM2LONG (4, SCM_CDR (value)); + ling.l_linger = (int) lv; + SCM_ASSERT_RANGE (SCM_ARG4, value, ling.l_linger == lv); + optlen = (int) sizeof (struct linger); + memcpy (optval, (void *) &ling, optlen); +#else + int ling; + long lv; + + SCM_ASSERT (SCM_CONSP (value), value, SCM_ARG4, FUNC_NAME); + /* timeout is ignored, but may as well validate it. */ + lv = SCM_NUM2LONG (4, SCM_CDR (value)); + ling = (int) lv; + SCM_ASSERT_RANGE (SCM_ARG4, value, ling == lv); + lv = SCM_NUM2LONG (4, SCM_CAR (value)); + ling = (int) lv; + SCM_ASSERT_RANGE (SCM_ARG4, value, ling == lv); + optlen = (int) sizeof (int); + (*(int *) optval) = ling; +#endif + } + else +#endif + if (0 +#ifdef SO_SNDBUF + || ioptname == SO_SNDBUF +#endif +#ifdef SO_RCVBUF + || ioptname == SO_RCVBUF +#endif + ) + { + long lv = SCM_NUM2LONG (4, value); + + optlen = (int) sizeof (size_t); + (*(size_t *) optval) = (size_t) lv; + } + } + if (optlen == -1) + { + /* Most options take an int. */ + long lv = SCM_NUM2LONG (4, value); + int val = (int) lv; + + SCM_ASSERT_RANGE (SCM_ARG4, value, val == lv); + optlen = (int) sizeof (int); + (*(int *) optval) = val; + } + if (setsockopt (fd, ilevel, ioptname, (void *) optval, optlen) == -1) + SCM_SYSERROR; + return SCM_UNSPECIFIED; +} +#undef FUNC_NAME + +SCM_DEFINE (scm_shutdown, "shutdown", 2, 0, 0, + (SCM sock, SCM how), + "Sockets can be closed simply by using @code{close-port}. The\n" + "@code{shutdown} procedure allows reception or tranmission on a\n" + "connection to be shut down individually, according to the parameter\n" + "@var{how}:\n\n" + "@table @asis\n" + "@item 0\n" + "Stop receiving data for this socket. If further data arrives, reject it.\n" + "@item 1\n" + "Stop trying to transmit data from this socket. Discard any\n" + "data waiting to be sent. Stop looking for acknowledgement of\n" + "data already sent; don't retransmit it if it is lost.\n" + "@item 2\n" + "Stop both reception and transmission.\n" + "@end table\n\n" + "The return value is unspecified.") +#define FUNC_NAME s_scm_shutdown +{ + int fd; + sock = SCM_COERCE_OUTPORT (sock); + SCM_VALIDATE_OPFPORT (1,sock); + SCM_VALIDATE_INUM (2,how); + SCM_ASSERT_RANGE(2,how,0 <= SCM_INUM (how) && 2 >= SCM_INUM (how)); + fd = SCM_FPORT_FDES (sock); + if (shutdown (fd, SCM_INUM (how)) == -1) + SCM_SYSERROR; + return SCM_UNSPECIFIED; +} +#undef FUNC_NAME + +/* convert fam/address/args into a sockaddr of the appropriate type. + args is modified by removing the arguments actually used. + which_arg and proc are used when reporting errors: + which_arg is the position of address in the original argument list. + proc is the name of the original procedure. + size returns the size of the structure allocated. */ + +static struct sockaddr * +scm_fill_sockaddr (int fam, SCM address, SCM *args, int which_arg, + const char *proc, int *size) +#define FUNC_NAME proc +{ + switch (fam) + { + case AF_INET: + { + struct sockaddr_in *soka; + unsigned long addr; + int port; + + SCM_VALIDATE_ULONG_COPY (which_arg, address, addr); + SCM_VALIDATE_CONS (which_arg + 1, *args); + SCM_VALIDATE_INUM_COPY (which_arg + 1, SCM_CAR (*args), port); + *args = SCM_CDR (*args); + soka = (struct sockaddr_in *) malloc (sizeof (struct sockaddr_in)); + if (!soka) + scm_memory_error (proc); + /* 4.4BSD-style interface includes sin_len member and defines SIN_LEN, + 4.3BSD does not. */ +#ifdef SIN_LEN + soka->sin_len = sizeof (struct sockaddr_in); +#endif + soka->sin_family = AF_INET; + soka->sin_addr.s_addr = htonl (addr); + soka->sin_port = htons (port); + *size = sizeof (struct sockaddr_in); + return (struct sockaddr *) soka; + } +#ifdef HAVE_IPV6 + case AF_INET6: + { + /* see RFC2553. */ + int port; + struct sockaddr_in6 *soka; + unsigned long flowinfo = 0; + unsigned long scope_id = 0; + + VALIDATE_INET6 (which_arg, address); + SCM_VALIDATE_CONS (which_arg + 1, *args); + SCM_VALIDATE_INUM_COPY (which_arg + 1, SCM_CAR (*args), port); + *args = SCM_CDR (*args); + if (SCM_CONSP (*args)) + { + SCM_VALIDATE_ULONG_COPY (which_arg + 2, SCM_CAR (*args), flowinfo); + *args = SCM_CDR (*args); + if (SCM_CONSP (*args)) + { + SCM_VALIDATE_ULONG_COPY (which_arg + 3, SCM_CAR (*args), + scope_id); + *args = SCM_CDR (*args); + } + } + soka = (struct sockaddr_in6 *) malloc (sizeof (struct sockaddr_in6)); + if (!soka) + scm_memory_error (proc); +#ifdef SIN_LEN6 + soka->sin6_len = sizeof (struct sockaddr_in6); +#endif + soka->sin6_family = AF_INET6; + ipv6_num_to_net (address, soka->sin6_addr.s6_addr); + soka->sin6_port = htons (port); + soka->sin6_flowinfo = flowinfo; +#ifdef HAVE_SIN6_SCOPE_ID + soka->sin6_scope_id = scope_id; +#endif + *size = sizeof (struct sockaddr_in6); + return (struct sockaddr *) soka; + } +#endif +#ifdef HAVE_UNIX_DOMAIN_SOCKETS + case AF_UNIX: + { + struct sockaddr_un *soka; + int addr_size; + + SCM_ASSERT (SCM_STRINGP (address), address, which_arg, proc); + /* the static buffer size in sockaddr_un seems to be arbitrary + and not necessarily a hard limit. e.g., the glibc manual + suggests it may be possible to declare it size 0. let's + ignore it. if the O/S doesn't like the size it will cause + connect/bind etc., to fail. sun_path is always the last + member of the structure. */ + addr_size = sizeof (struct sockaddr_un) + + max (0, SCM_STRING_LENGTH (address) + 1 - (sizeof soka->sun_path)); + soka = (struct sockaddr_un *) malloc (addr_size); + if (!soka) + scm_memory_error (proc); + memset (soka, 0, addr_size); /* for sun_len: see sin_len above. */ + soka->sun_family = AF_UNIX; + memcpy (soka->sun_path, SCM_STRING_CHARS (address), + SCM_STRING_LENGTH (address)); + *size = SUN_LEN (soka); + return (struct sockaddr *) soka; + } +#endif + default: + scm_out_of_range (proc, SCM_MAKINUM (fam)); + } +} +#undef FUNC_NAME + +SCM_DEFINE (scm_connect, "connect", 3, 0, 1, + (SCM sock, SCM fam, SCM address, SCM args), + "Initiate a connection from a socket using a specified address\n" + "family to the address\n" + "specified by @var{address} and possibly @var{args}.\n" + "The format required for @var{address}\n" + "and @var{args} depends on the family of the socket.\n\n" + "For a socket of family @code{AF_UNIX},\n" + "only @var{address} is specified and must be a string with the\n" + "filename where the socket is to be created.\n\n" + "For a socket of family @code{AF_INET},\n" + "@var{address} must be an integer IPv4 host address and\n" + "@var{args} must be a single integer port number.\n\n" + "For a socket of family @code{AF_INET6},\n" + "@var{address} must be an integer IPv6 host address and\n" + "@var{args} may be up to three integers:\n" + "port [flowinfo] [scope_id],\n" + "where flowinfo and scope_id default to zero.\n\n" + "The return value is unspecified.") +#define FUNC_NAME s_scm_connect +{ + int fd; + struct sockaddr *soka; + int size; + + sock = SCM_COERCE_OUTPORT (sock); + SCM_VALIDATE_OPFPORT (1,sock); + SCM_VALIDATE_INUM (2,fam); + fd = SCM_FPORT_FDES (sock); + soka = scm_fill_sockaddr (SCM_INUM (fam), address, &args, 3, FUNC_NAME, + &size); + if (connect (fd, soka, size) == -1) + { + int save_errno = errno; + + free (soka); + errno = save_errno; + SCM_SYSERROR; + } + free (soka); + return SCM_UNSPECIFIED; +} +#undef FUNC_NAME + +SCM_DEFINE (scm_bind, "bind", 3, 0, 1, + (SCM sock, SCM fam, SCM address, SCM args), + "Assign an address to the socket port @var{sock}.\n" + "Generally this only needs to be done for server sockets,\n" + "so they know where to look for incoming connections. A socket\n" + "without an address will be assigned one automatically when it\n" + "starts communicating.\n\n" + "The format of @var{address} and @var{args} depends\n" + "on the family of the socket.\n\n" + "For a socket of family @code{AF_UNIX}, only @var{address}\n" + "is specified and must be a string with the filename where\n" + "the socket is to be created.\n\n" + "For a socket of family @code{AF_INET}, @var{address}\n" + "must be an integer IPv4 address and @var{args}\n" + "must be a single integer port number.\n\n" + "The values of the following variables can also be used for\n" + "@var{address}:\n\n" + "@defvar INADDR_ANY\n" + "Allow connections from any address.\n" + "@end defvar\n\n" + "@defvar INADDR_LOOPBACK\n" + "The address of the local host using the loopback device.\n" + "@end defvar\n\n" + "@defvar INADDR_BROADCAST\n" + "The broadcast address on the local network.\n" + "@end defvar\n\n" + "@defvar INADDR_NONE\n" + "No address.\n" + "@end defvar\n\n" + "For a socket of family @code{AF_INET6}, @var{address}\n" + "must be an integer IPv6 address and @var{args}\n" + "may be up to three integers:\n" + "port [flowinfo] [scope_id],\n" + "where flowinfo and scope_id default to zero.\n\n" + "The return value is unspecified.") +#define FUNC_NAME s_scm_bind +{ + struct sockaddr *soka; + int size; + int fd; + + sock = SCM_COERCE_OUTPORT (sock); + SCM_VALIDATE_OPFPORT (1, sock); + SCM_VALIDATE_INUM (2, fam); + soka = scm_fill_sockaddr (SCM_INUM (fam), address, &args, 3, FUNC_NAME, + &size); + fd = SCM_FPORT_FDES (sock); + if (bind (fd, soka, size) == -1) + { + int save_errno = errno; + + free (soka); + errno = save_errno; + SCM_SYSERROR; + } + free (soka); + return SCM_UNSPECIFIED; +} +#undef FUNC_NAME + +SCM_DEFINE (scm_listen, "listen", 2, 0, 0, + (SCM sock, SCM backlog), + "Enable @var{sock} to accept connection\n" + "requests. @var{backlog} is an integer specifying\n" + "the maximum length of the queue for pending connections.\n" + "If the queue fills, new clients will fail to connect until\n" + "the server calls @code{accept} to accept a connection from\n" + "the queue.\n\n" + "The return value is unspecified.") +#define FUNC_NAME s_scm_listen +{ + int fd; + sock = SCM_COERCE_OUTPORT (sock); + SCM_VALIDATE_OPFPORT (1,sock); + SCM_VALIDATE_INUM (2,backlog); + fd = SCM_FPORT_FDES (sock); + if (listen (fd, SCM_INUM (backlog)) == -1) + SCM_SYSERROR; + return SCM_UNSPECIFIED; +} +#undef FUNC_NAME + +/* Put the components of a sockaddr into a new SCM vector. */ +static SCM +scm_addr_vector (const struct sockaddr *address, const char *proc) +{ + short int fam = address->sa_family; + SCM result; + SCM *ve; + + switch (fam) + { + case AF_INET: + { + const struct sockaddr_in *nad = (struct sockaddr_in *) address; + + result = scm_c_make_vector (3, SCM_UNSPECIFIED); + ve = SCM_VELTS (result); + ve[0] = scm_ulong2num ((unsigned long) fam); + ve[1] = scm_ulong2num (ntohl (nad->sin_addr.s_addr)); + ve[2] = scm_ulong2num ((unsigned long) ntohs (nad->sin_port)); + } + break; +#ifdef HAVE_IPV6 + case AF_INET6: + { + const struct sockaddr_in6 *nad = (struct sockaddr_in6 *) address; + + result = scm_c_make_vector (5, SCM_UNSPECIFIED); + ve = SCM_VELTS (result); + ve[0] = scm_ulong2num ((unsigned long) fam); + ve[1] = ipv6_net_to_num (nad->sin6_addr.s6_addr); + ve[2] = scm_ulong2num ((unsigned long) ntohs (nad->sin6_port)); + ve[3] = scm_ulong2num ((unsigned long) nad->sin6_flowinfo); +#ifdef HAVE_SIN6_SCOPE_ID + ve[4] = scm_ulong2num ((unsigned long) nad->sin6_scope_id); +#else + ve[4] = SCM_INUM0; +#endif + } + break; +#endif +#ifdef HAVE_UNIX_DOMAIN_SOCKETS + case AF_UNIX: + { + const struct sockaddr_un *nad = (struct sockaddr_un *) address; + + result = scm_c_make_vector (2, SCM_UNSPECIFIED); + ve = SCM_VELTS (result); + ve[0] = scm_ulong2num ((unsigned long) fam); + ve[1] = scm_makfromstr (nad->sun_path, + (size_t) strlen (nad->sun_path), 0); + } + break; +#endif + default: + scm_misc_error (proc, "Unrecognised address family: ~A", + SCM_LIST1 (SCM_MAKINUM (fam))); + } + return result; +} + +/* calculate the size of a buffer large enough to hold any supported + sockaddr type. if the buffer isn't large enough, certain system + calls will return a truncated address. */ + +#if defined (HAVE_UNIX_DOMAIN_SOCKETS) +#define MAX_SIZE_UN sizeof (struct sockaddr_un) +#else +#define MAX_SIZE_UN 0 +#endif + +#if defined (HAVE_IPV6) +#define MAX_SIZE_IN6 sizeof (struct sockaddr_in6) +#else +#define MAX_SIZE_IN6 0 +#endif + +#define MAX_ADDR_SIZE max (max (sizeof (struct sockaddr_in), MAX_SIZE_IN6),\ + MAX_SIZE_UN) + +SCM_DEFINE (scm_accept, "accept", 1, 0, 0, + (SCM sock), + "Accept a connection on a bound, listening socket.\n" + "If there\n" + "are no pending connections in the queue, wait until\n" + "one is available unless the non-blocking option has been\n" + "set on the socket.\n\n" + "The return value is a\n" + "pair in which the @emph{car} is a new socket port for the\n" + "connection and\n" + "the @emph{cdr} is an object with address information about the\n" + "client which initiated the connection.\n\n" + "@var{sock} does not become part of the\n" + "connection and will continue to accept new requests.") +#define FUNC_NAME s_scm_accept +{ + int fd; + int newfd; + SCM address; + SCM newsock; + int addr_size = MAX_ADDR_SIZE; + char max_addr[MAX_ADDR_SIZE]; + struct sockaddr *addr = (struct sockaddr *) max_addr; + + sock = SCM_COERCE_OUTPORT (sock); + SCM_VALIDATE_OPFPORT (1, sock); + fd = SCM_FPORT_FDES (sock); + newfd = accept (fd, addr, &addr_size); + if (newfd == -1) + SCM_SYSERROR; + newsock = SCM_SOCK_FD_TO_PORT (newfd); + address = scm_addr_vector (addr, FUNC_NAME); + return scm_cons (newsock, address); +} +#undef FUNC_NAME + +SCM_DEFINE (scm_getsockname, "getsockname", 1, 0, 0, + (SCM sock), + "Return the address of @var{sock}, in the same form as the\n" + "object returned by @code{accept}. On many systems the address\n" + "of a socket in the @code{AF_FILE} namespace cannot be read.") +#define FUNC_NAME s_scm_getsockname +{ + int fd; + int addr_size = MAX_ADDR_SIZE; + char max_addr[MAX_ADDR_SIZE]; + struct sockaddr *addr = (struct sockaddr *) max_addr; + + sock = SCM_COERCE_OUTPORT (sock); + SCM_VALIDATE_OPFPORT (1,sock); + fd = SCM_FPORT_FDES (sock); + if (getsockname (fd, addr, &addr_size) == -1) + SCM_SYSERROR; + return scm_addr_vector (addr, FUNC_NAME); +} +#undef FUNC_NAME + +SCM_DEFINE (scm_getpeername, "getpeername", 1, 0, 0, + (SCM sock), + "Return the address that @var{sock}\n" + "is connected to, in the same form as the object returned by\n" + "@code{accept}. On many systems the address of a socket in the\n" + "@code{AF_FILE} namespace cannot be read.") +#define FUNC_NAME s_scm_getpeername +{ + int fd; + int addr_size = MAX_ADDR_SIZE; + char max_addr[MAX_ADDR_SIZE]; + struct sockaddr *addr = (struct sockaddr *) max_addr; + + sock = SCM_COERCE_OUTPORT (sock); + SCM_VALIDATE_OPFPORT (1,sock); + fd = SCM_FPORT_FDES (sock); + if (getpeername (fd, addr, &addr_size) == -1) + SCM_SYSERROR; + return scm_addr_vector (addr, FUNC_NAME); +} +#undef FUNC_NAME + +SCM_DEFINE (scm_recv, "recv!", 2, 1, 0, + (SCM sock, SCM buf, SCM flags), + "Receive data from a socket port.\n" + "@var{sock} must already\n" + "be bound to the address from which data is to be received.\n" + "@var{buf} is a string into which\n" + "the data will be written. The size of @var{buf} limits\n" + "the amount of\n" + "data which can be received: in the case of packet\n" + "protocols, if a packet larger than this limit is encountered\n" + "then some data\n" + "will be irrevocably lost.\n\n" + "The optional @var{flags} argument is a value or\n" + "bitwise OR of MSG_OOB, MSG_PEEK, MSG_DONTROUTE etc.\n\n" + "The value returned is the number of bytes read from the\n" + "socket.\n\n" + "Note that the data is read directly from the socket file\n" + "descriptor:\n" + "any unread buffered port data is ignored.") +#define FUNC_NAME s_scm_recv +{ + int rv; + int fd; + int flg; + + SCM_VALIDATE_OPFPORT (1,sock); + SCM_VALIDATE_STRING (2,buf); + SCM_VALIDATE_INUM_DEF_COPY (3,flags,0,flg); + fd = SCM_FPORT_FDES (sock); + + SCM_SYSCALL (rv = recv (fd, SCM_STRING_CHARS (buf), SCM_STRING_LENGTH (buf), flg)); + if (rv == -1) + SCM_SYSERROR; + + return SCM_MAKINUM (rv); +} +#undef FUNC_NAME + +SCM_DEFINE (scm_send, "send", 2, 1, 0, + (SCM sock, SCM message, SCM flags), + "Transmit the string @var{message} on a socket port @var{sock}.\n" + "@var{sock} must already be bound to a destination address. The\n" + "value returned is the number of bytes transmitted --\n" + "it's possible for\n" + "this to be less than the length of @var{message}\n" + "if the socket is\n" + "set to be non-blocking. The optional @var{flags} argument\n" + "is a value or\n" + "bitwise OR of MSG_OOB, MSG_PEEK, MSG_DONTROUTE etc.\n\n" + "Note that the data is written directly to the socket\n" + "file descriptor:\n" + "any unflushed buffered port data is ignored.") +#define FUNC_NAME s_scm_send +{ + int rv; + int fd; + int flg; + + sock = SCM_COERCE_OUTPORT (sock); + SCM_VALIDATE_OPFPORT (1,sock); + SCM_VALIDATE_STRING (2, message); + SCM_VALIDATE_INUM_DEF_COPY (3,flags,0,flg); + fd = SCM_FPORT_FDES (sock); + + SCM_SYSCALL (rv = send (fd, SCM_STRING_CHARS (message), SCM_STRING_LENGTH (message), flg)); + if (rv == -1) + SCM_SYSERROR; + return SCM_MAKINUM (rv); +} +#undef FUNC_NAME + +SCM_DEFINE (scm_recvfrom, "recvfrom!", 2, 3, 0, + (SCM sock, SCM str, SCM flags, SCM start, SCM end), + "Return data from the socket port @var{sock} and also\n" + "information about where the data was received from.\n" + "@var{sock} must already be bound to the address from which\n" + "data is to be received. @code{str}, is a string into which the\n" + "data will be written. The size of @var{str} limits the amount\n" + "of data which can be received: in the case of packet protocols,\n" + "if a packet larger than this limit is encountered then some\n" + "data will be irrevocably lost.\n\n" + "The optional @var{flags} argument is a value or bitwise OR of\n" + "@code{MSG_OOB}, @code{MSG_PEEK}, @code{MSG_DONTROUTE} etc.\n\n" + "The value returned is a pair: the @emph{car} is the number of\n" + "bytes read from the socket and the @emph{cdr} an address object\n" + "in the same form as returned by @code{accept}. The address\n" + "will given as @code{#f} if not available, as is usually the\n" + "case for stream sockets.\n\n" + "The @var{start} and @var{end} arguments specify a substring of\n" + "@var{str} to which the data should be written.\n\n" + "Note that the data is read directly from the socket file\n" + "descriptor: any unread buffered port data is ignored.") +#define FUNC_NAME s_scm_recvfrom +{ + int rv; + int fd; + int flg; + char *buf; + int offset; + int cend; + SCM address; + int addr_size = MAX_ADDR_SIZE; + char max_addr[MAX_ADDR_SIZE]; + struct sockaddr *addr = (struct sockaddr *) max_addr; + + SCM_VALIDATE_OPFPORT (1,sock); + fd = SCM_FPORT_FDES (sock); + SCM_VALIDATE_SUBSTRING_SPEC_COPY (2, str, buf, 4, start, offset, + 5, end, cend); + if (SCM_UNBNDP (flags)) + flg = 0; + else + SCM_VALIDATE_ULONG_COPY (3, flags, flg); + + /* recvfrom will not necessarily return an address. usually nothing + is returned for stream sockets. */ + addr->sa_family = AF_UNSPEC; + SCM_SYSCALL (rv = recvfrom (fd, buf + offset, + cend - offset, flg, + addr, &addr_size)); + if (rv == -1) + SCM_SYSERROR; + if (addr->sa_family != AF_UNSPEC) + address = scm_addr_vector (addr, FUNC_NAME); + else + address = SCM_BOOL_F; + + return scm_cons (SCM_MAKINUM (rv), address); +} +#undef FUNC_NAME + +SCM_DEFINE (scm_sendto, "sendto", 4, 0, 1, + (SCM sock, SCM message, SCM fam, SCM address, SCM args_and_flags), + "Transmit the string @var{message} on the socket port\n" + "@var{sock}. The\n" + "destination address is specified using the @var{fam},\n" + "@var{address} and\n" + "@var{args_and_flags} arguments, in a similar way to the\n" + "@code{connect} procedure. @var{args_and_flags} contains\n" + "the usual connection arguments optionally followed by\n" + "a flags argument, which is a value or\n" + "bitwise OR of MSG_OOB, MSG_PEEK, MSG_DONTROUTE etc.\n\n" + "The value returned is the number of bytes transmitted --\n" + "it's possible for\n" + "this to be less than the length of @var{message} if the\n" + "socket is\n" + "set to be non-blocking.\n" + "Note that the data is written directly to the socket\n" + "file descriptor:\n" + "any unflushed buffered port data is ignored.") +#define FUNC_NAME s_scm_sendto +{ + int rv; + int fd; + int flg; + struct sockaddr *soka; + int size; + + sock = SCM_COERCE_OUTPORT (sock); + SCM_VALIDATE_FPORT (1,sock); + SCM_VALIDATE_STRING (2, message); + SCM_VALIDATE_INUM (3,fam); + fd = SCM_FPORT_FDES (sock); + soka = scm_fill_sockaddr (SCM_INUM (fam), address, &args_and_flags, 4, + FUNC_NAME, &size); + if (SCM_NULLP (args_and_flags)) + flg = 0; + else + { + SCM_VALIDATE_CONS (5,args_and_flags); + flg = SCM_NUM2ULONG (5, SCM_CAR (args_and_flags)); + } + SCM_SYSCALL (rv = sendto (fd, SCM_STRING_CHARS (message), + SCM_STRING_LENGTH (message), + flg, soka, size)); + if (rv == -1) + { + int save_errno = errno; + free (soka); + errno = save_errno; + SCM_SYSERROR; + } + free (soka); + return SCM_MAKINUM (rv); +} +#undef FUNC_NAME + + + +void +scm_init_socket () +{ + /* protocol families. */ +#ifdef AF_UNSPEC + scm_c_define ("AF_UNSPEC", SCM_MAKINUM (AF_UNSPEC)); +#endif +#ifdef AF_UNIX + scm_c_define ("AF_UNIX", SCM_MAKINUM (AF_UNIX)); +#endif +#ifdef AF_INET + scm_c_define ("AF_INET", SCM_MAKINUM (AF_INET)); +#endif +#ifdef AF_INET6 + scm_c_define ("AF_INET6", SCM_MAKINUM (AF_INET6)); +#endif + +#ifdef PF_UNSPEC + scm_c_define ("PF_UNSPEC", SCM_MAKINUM (PF_UNSPEC)); +#endif +#ifdef PF_UNIX + scm_c_define ("PF_UNIX", SCM_MAKINUM (PF_UNIX)); +#endif +#ifdef PF_INET + scm_c_define ("PF_INET", SCM_MAKINUM (PF_INET)); +#endif +#ifdef PF_INET6 + scm_c_define ("PF_INET6", SCM_MAKINUM (PF_INET6)); +#endif + + /* standard addresses. */ +#ifdef INADDR_ANY + scm_c_define ("INADDR_ANY", scm_ulong2num (INADDR_ANY)); +#endif +#ifdef INADDR_BROADCAST + scm_c_define ("INADDR_BROADCAST", scm_ulong2num (INADDR_BROADCAST)); +#endif +#ifdef INADDR_NONE + scm_c_define ("INADDR_NONE", scm_ulong2num (INADDR_NONE)); +#endif +#ifdef INADDR_LOOPBACK + scm_c_define ("INADDR_LOOPBACK", scm_ulong2num (INADDR_LOOPBACK)); +#endif + + /* socket types. */ +#ifdef SOCK_STREAM + scm_c_define ("SOCK_STREAM", SCM_MAKINUM (SOCK_STREAM)); +#endif +#ifdef SOCK_DGRAM + scm_c_define ("SOCK_DGRAM", SCM_MAKINUM (SOCK_DGRAM)); +#endif +#ifdef SOCK_RAW + scm_c_define ("SOCK_RAW", SCM_MAKINUM (SOCK_RAW)); +#endif + + /* setsockopt level. */ +#ifdef SOL_SOCKET + scm_c_define ("SOL_SOCKET", SCM_MAKINUM (SOL_SOCKET)); +#endif +#ifdef SOL_IP + scm_c_define ("SOL_IP", SCM_MAKINUM (SOL_IP)); +#endif +#ifdef SOL_TCP + scm_c_define ("SOL_TCP", SCM_MAKINUM (SOL_TCP)); +#endif +#ifdef SOL_UDP + scm_c_define ("SOL_UDP", SCM_MAKINUM (SOL_UDP)); +#endif + + /* setsockopt names. */ +#ifdef SO_DEBUG + scm_c_define ("SO_DEBUG", SCM_MAKINUM (SO_DEBUG)); +#endif +#ifdef SO_REUSEADDR + scm_c_define ("SO_REUSEADDR", SCM_MAKINUM (SO_REUSEADDR)); +#endif +#ifdef SO_STYLE + scm_c_define ("SO_STYLE", SCM_MAKINUM (SO_STYLE)); +#endif +#ifdef SO_TYPE + scm_c_define ("SO_TYPE", SCM_MAKINUM (SO_TYPE)); +#endif +#ifdef SO_ERROR + scm_c_define ("SO_ERROR", SCM_MAKINUM (SO_ERROR)); +#endif +#ifdef SO_DONTROUTE + scm_c_define ("SO_DONTROUTE", SCM_MAKINUM (SO_DONTROUTE)); +#endif +#ifdef SO_BROADCAST + scm_c_define ("SO_BROADCAST", SCM_MAKINUM (SO_BROADCAST)); +#endif +#ifdef SO_SNDBUF + scm_c_define ("SO_SNDBUF", SCM_MAKINUM (SO_SNDBUF)); +#endif +#ifdef SO_RCVBUF + scm_c_define ("SO_RCVBUF", SCM_MAKINUM (SO_RCVBUF)); +#endif +#ifdef SO_KEEPALIVE + scm_c_define ("SO_KEEPALIVE", SCM_MAKINUM (SO_KEEPALIVE)); +#endif +#ifdef SO_OOBINLINE + scm_c_define ("SO_OOBINLINE", SCM_MAKINUM (SO_OOBINLINE)); +#endif +#ifdef SO_NO_CHECK + scm_c_define ("SO_NO_CHECK", SCM_MAKINUM (SO_NO_CHECK)); +#endif +#ifdef SO_PRIORITY + scm_c_define ("SO_PRIORITY", SCM_MAKINUM (SO_PRIORITY)); +#endif +#ifdef SO_LINGER + scm_c_define ("SO_LINGER", SCM_MAKINUM (SO_LINGER)); +#endif + + /* recv/send options. */ +#ifdef MSG_OOB + scm_c_define ("MSG_OOB", SCM_MAKINUM (MSG_OOB)); +#endif +#ifdef MSG_PEEK + scm_c_define ("MSG_PEEK", SCM_MAKINUM (MSG_PEEK)); +#endif +#ifdef MSG_DONTROUTE + scm_c_define ("MSG_DONTROUTE", SCM_MAKINUM (MSG_DONTROUTE)); +#endif + + scm_add_feature ("socket"); + +#ifndef SCM_MAGIC_SNARFER +#include "libguile/socket.x" +#endif +} + + +/* + Local Variables: + c-file-style: "gnu" + End: +*/